call to factory.on() method/event?

[misa-jaja]

I'm trying to call the

factory.on('PairCreated', async (token0, token1, pairAddress) => { 
           console.log('factory is running');
           // other sniping methods here}
          );

function in a menu run by a while loop:

let choice;
while (choice !== '0') {
console.log(`
1. detect pair
2. do something else
`);
 choice = prompt("Pick an option:");
if (choice == '1') {
    //call the factory.on event -> await snipe();}

I've tried wrapping it in an async function called snipe, but all it does is return to while loop menu prompting me for an option. I've even tried printing statements written in the snipe function before the factory.on method is run and after. All it does is print both statements consecutively without running the factory.on method, then it returns to the menu.

I've run this without the menu and it runs fine, even printing the console.log command in the factory.on event.

[zemse]

The event listner might not immediately log output in console, it does only when there'd be an event. But you can console log before adding the listener.

function startPairDetection() {
  console.log('pair detection started');
  factory.on('PairCreated', async (token0, token1, pairAddress) => { 
    ...
  })
}